Concrete-mixer.



No. 853,623. PATBNTEB MAY 14, ld?. F. A, BURST.

GNGRETE MIXER.

PPMS/ammi FILED Dm 2a, 1mm,

3 SHEETS-'EERST 1.

42 +9 Sa +2 wso z +7 O I O +9 39 411 o v3- v FIGS.

Bordi.,

JAM w. yawmurfqm MAY 1997;

P. A. BORSE QIGRETB Bi Hummm Hmm ms'. 2g, Y

3 SHEETSwST 3.

wjtmzsses v i i gg NLS itung Y UNITED STATES IUYFElNlli FICE. FRANK A. honor, or s( )Urn IIIrNII, INDIANA, AssIGNoR To IDEAL coNcRsTE M'Acnl mehr ooMrANr, or soufre BEND, INDIANA, A CORPORATION or INDIANA.

QONCRETE-MXER.

KEpecioaticm of Letters Patent. Application @ed neuester 28,19%. sein No. sitges.

No. 863,623. Patented May 14, 1907.

g the stub shaft 16 which is rigid with the Hangs or disk 17 at the other en of the' drum. Between thetw'o heads 19 of the drum extend a series of buckets 20 which convex outwardand are formed enerally spiral in cross section as shownV ,in idg. 3,. and are made up of Hat sections. This 1s partly because of ease in manufacture, but especially because the angular forni efthese buckets aids in the mixing. The 21 of the buckets areflangedcutafardiy (1ndioated by dotted lines, Fi 33 .which flanges are attached to the Ahea s 19.1 The yinner edges of thefbuckets are turned in 'toform To all. .IL-Imm l? may concern. I bgmjnog 15 fg;-

Be it known that I, FRANK A. Bons'r, a United States,V and a resident of the city of South Bend, in the county of Joseph and State of Indiana, have invent ed a new and Improved Concrete-Mixer, ofV which the following is a specification. Y

lMy invention relates to mechanical means for thoroughly mixing various substances, particularly the materials that are used to make concrete; and the objects of my im* prhvenients aref-to provide means of this kind in which the materials can he first mixed in the dry state and afterward in the presence of water; and to provide a drum mixer in which the materials can be thoroughly mixed and f rom which it can be discharged tirrsngii o1 nings in the drum on vrotating the saine in the reverse direction. My invention further consists in the forining of the s iral sections of the drum so that the materia s will bc caused to converge and then be separated.

In the accompanying citizen of the e chute 23 extends intothe central opening of the drum and through itthe material Yisduinped into the machine. While the Inachiiie is turning to the right (Figa, 1 and 3,) the material will roll through itself, especiall lconvex' ing to the middle on account of t e conica construction of the huclnetsg which prevents the different materials Y from .remain in parallel drawings, :iigurc i is arzges Q which materially aid in the mixing.

around over and an end view of the complete machine, Fig. 2 hands around the inside of the rum. When is a plan of the same. ,Fig 3 is a cross secthe motion of the drum is reversed, (turning l tion on theline'A-A of Pig. 2. Fig. 4 is a to the left, Fig. 3) the material Wiii slide out detail of the screw of the second mixer. Fig". along the buckets and dischar e throu h the 5 is an end View of the screw mixer. F'g. 6 o emngs between the outer ge of eac 1 and is a side View of the saine. y

Y Similar reference characters .refer to like parts throughout the several vielws.

It is often desirable to mix concrete in batches, and also to first mix the materials dry and then mix them again after addinv Water. In the accompanying drawings,l have shown my improved mixer which consists of a novel drum mixer mounted so that it can dischar e into s screw mixer, means being providewhereby Water may be added to the mixed materials while they are moved along by the screw.

The frame of this machine consists of the stringcrs l, the uprights 2 and 3, the cross pieces 4, 5, 6, 7, 8, and 9 and connecting ieces 10, and is braced wherever necessary. ,`hc cross iece 9 is a part Vof a portion of the frame which projects rearwardly from the cross r'cce 4 of the main frame. Any other desiralale style of frame may be employed.

Mounted on the cross piece 6 is a yoke 71 carrying bearing wheels 12 Whichrun inthe t e next adjacentlrfollowing bucket.

The here] ear 1.8 on the end of the driving shaft 25 nies es with the gears 24 and 26 on the shaft The driving shaft 25 has a x other desirabie means for transmitting power to this shaft may beA employed. f.

The gears d on the stub shaft 16 and are caused to revolve in o posite direct-ions by the gear 18. A clutch s eeve 27 having a oove to en e the key .139 in the shaft 16 wi'i cause the slit to revolve with gear 24 or 26, depending upon Vwhether the jaws of the sleeve engageV has aring 39 whic to shift the clutch ner. direction "of revolution brown. and any other desirable system may he employed. By swinging the lever 31, the drum may be caused to revolve in either' sleeve In the usual'manosition.

e lever to a'central y 0f thsbrel sw 2:1

Attached to the hu the drum. Un the cross pieces 4 and 9 are and 26 are loosely rnounted the jaws'on the ear 24 .or 26. The sleeve' is engaged by the lever 31 Y This system of gears to chan e the- 1 of the drinn lgs' dell pulley 2S mounted on'its outerend,V but any les direction, or Vit may be stopped by moving groove 13 of the bearing ring 14 at one end of th is ilu'. sprocket wheel 32 for driving the screw mixe-r As this bevel fear revolves in butone dircfl ion, the screw o"the1nixer will turn in n constant dircction.

rl`he trough 38 of the screw mixer is sup- .orted by saddles 39, carried by the i'rame. lhe trough is provided with wings or aprons 40 and 4] to catch the material as it is discharged from the drum. The shaft 42 extends through the bearin 43 carried by the cross piece 5, and heyon the bearing is the sprocket wheel 471 which is connected so the driving sprocket wheel32 by means of the chain 45.

The op )osite end of the shaft 42 extends through tlle bearing 46 carried by the cross bar *17 which is mounted on the rods 48 of the-brackets 49. The springs 50 normally hold down this cross bar, but should any gravel or iece of stone get wedged under a sc ew bla e, the end of the shaft can rise and rc ieve the strain. The brackets are secured tothe end saddle 39 and cross bar S.

The major portion of the screw shaft is square, and the blades .58 are provided with slots 57 so that thehmay be adjustably se cured to the shaft by means of the bolts 56. As the position of the blades is such that the blade succeeding in pitch precedes longitudinally, the material is well mixed in its passage. toward the discharge opening 55.

A water tank 54 having discharge pipe 53 may he mounted at any convenient location. The chute 23 is provided with a slide gate or valvel 55 of any desired form which is adaptto control the passage of the materials into the drum mixer.

The materials for a batch of concrete is dumped into the chute 23 and slides down into the drum where it is well mixed. When the mixing has heen completed, the lever 31 is swung over, and, the drums movement being reversed, the material is dumped onto the screw of the lower mixer. Water is permitted to How onto the material after the screw has moved it from under the drum mixer. As soon as the batch has passed from the ,chute 23into the mixer, the gate 55 is pushed in, permitting a second batch to bc dumped into the chute while the iirst is being mixed. After the first hatch has been dumped and the drum has been brought to again revolve in the mixing" direction, the gate is opened and the second batch permitted to slide into the drum.

The length of the trough 38 will depend upon the character of the work., its length varying indirectly as the amount of water used. First mixing dry then mixing wet forms ideal concrete. The type of drum mixer shown is not adapted for wet mixing while the screw mixer is especially adapted thereto.

Havin now explained my improvements, what I ciaim as mv invention and desire to secure by Letters Patent is,-

l. In a mixing machine, the combination of heads, means to revolublrsT support the same, spiral buckets connectmg said heads and providedr with interior flanges at their inner ends, the buckets being formed of pairs of flat plates and joined at the central plane of the mixing machine so as to form pyramidal parts united at their bases, and means to support the mixer.

2. In a mixing machine, the combination of heads, means to revolve the same, spiral buckets connecting said heads and provided with interior anges at their inner ends, the buckets being in halves joined at the central plane oi' the mixing machine so as to form pyramidal parts united at their bases, and means to support the mixer.

3. In a mixing machine, the combination of headsmeans to revolve the same, spiral buckets connecting said heads, said buckets bein in the form of pyramide] halves united at' tleir bases, and means to support the mlxer. c

In testimony whereof I have signed this application in the presence. of two subscribmg witnesses.

FRANK A. BURST. Witnesses:

G. B, HOPKINS, CHAs. E. Morrrr'r. 

